Of the projected 16.8 million vehicles sold in the US in 2019, plug in electrics will only amount to an estimated 405,000 units.

That is less than 2.5 %

"2018 was also a milestone year for EV sales, as the share of new vehicles purchased surpassed 2% for the first time. With only modest growth in 2019 and estimated sales of 16.8 million vehicles overall, I’m forecasting EV sales market share of around 2.45% for the year."

https://cleantechnica.com/2019/01/20/forecast-2019-us-ev-sales-growth-will-drop-to-12/